html，body {
  margin: 0;
  padding: 0;
}
body {
  background-color: #f2f3f5;
  padding: 15px !important;
}
.layui-card-header {
  display: flex;
  justify-content: space-between;
}
#btn {
  margin-top: 6px;
}
.layui-layer-content {
  padding: 20px 35px 0 0;
}
